My dad made a deal with me, and I might get the tank sooner than I thought (but I have to sell all my current fish and my two tanks...

) Anyways, I have a couple questions I need answered:
1. My new tank will be holding tiger barbs now and I spotted both gold and standard versions @ PetSmart (very healthy specimens

). Will the two subspecies shoal together?
2. I saw some silver hatchets too and I was wondering if they'd fall victim to the nippy tendencies of the tiger barbs even if I added the barbs last to reduce the risk? (adding them is a debate for me at the moment)
3. Red Tail Sharks wont wreak havoc on Tiger Barbs as they'll just nip right back, true?
4. Fish from the same genus when it comes to some cyprinids should not be added together, so if I wanted a flying fox plus my red tail? I'm guessing this aint ok?
5. FINALLY.... algae eater suggestions? Otos and maybe a flying fox are a couple possibilities for me, any other suggestions before I get the green light from my dad?